@mixin omit {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

@mixin bg-image($ul) {
  background-image: url($ul + '@2x.png');

  @media (-webkit-min-device-pixel-ratio: 3), (min-device-pixel-ratio: 3) {
    background-image: url($ul + '@3x.png')
  }
}
